Installing the Alignak WebUI is an easy operation.
The different installation methods are detailed in the documentation but the most easy way is to:

pipinstallalignak-webui

Once installed, the WebUI is ready to run and you can start with:

./bin/run.sh

Configuring the Alignak WebUI is made easy thanks to a settings.cfg file.
The default configuration makes the WebUI run on the local interface, on port 5001, and use a local Alignak backend running on port 5000.